<template>
  <div class="todo-header">
    <input type="text" v-model="content" placeholder="请输入你的任务名称，按回车键确认" @keyup.enter="addTodoObj" />
  </div>
</template>

<script>

import { nanoid } from 'nanoid';  
export default {
    name:"Header",

    props:["addTodos"],
    data() {
      return {
        content: '',
      };
    },
    methods: {
    addTodoObj(){
        let isNull = this.content=="";
        if (isNull) {
            alert("任务不能为空")
        } else {
             let todoObj = {id:nanoid(),content:this.content,finished:false}
             this.addTodos(todoObj)
        }
    }
    },
}
</script>

<style scoped>
  .todo-header input {
    width: 560px;
    height: 28px;
    font-size: 14px;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 4px 7px;
  }

  .todo-header input:focus {
    outline: none;
    border-color: rgba(82, 168, 236, 0.8);
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
  }
</style>